Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Write a recursive method that takes two strings str and forbidden and removes all characters from the forbidden string from str.

JAVA

import java.util.Scanner;

/**
 * A recursive method that removes forbidden characters from a string.
 */
public class CleanUp
{
   public static String clean(String str, String forbidden)
   {
      /* Your code goes here */
      if (forbidden.contains(first))
      {
         return /*  code goes here */
      }
      else
      {
         return /* code goes here */
      }
      
   }

   public static void main(String[] args)
   {
      Scanner in = new Scanner(System.in);
      while (in.hasNext())
      {
         String str1 = in.next();
         String str2 = in.next();
         System.out.println(clean(str1, str2));
      }
   }
}

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